WIKA A2G-200 User manual

Operating instruction
Betriebsanleitung
DE
EN
Control panel with integrated room sensor,
model A2G-200
Bediengerät mit intigriertem Raumfühler,
Typ A2G-200
Model A2G-200

2
20210728.01 10/2021 EN/DE
WIKA operating instructions model A2G-200
DE
EN Operating instructions model A2G-200 Page 3 - 26
Betriebsanleitung Typ A2G-200 Seite 27 - 50
© 10/2021 WIKA Alexander Wiegand SE & Co. KG
All rights reserved. / Alle Rechte vorbehalten.
WIKA®is a registered trademark in various countries.
WIKA®ist eine geschützte Marke in verschiedenen Ländern.
Prior to starting any work, read the operating instructions!
Keep for later use!
Vor Beginn aller Arbeiten Betriebsanleitung lesen!
Zum späteren Gebrauch aufbewahren!

3WIKA operating instructions model A2G-200
20210728.01 10/2021 EN/DE
EN
Contents
Contents
1. General information 4
2. Design and function 5
3. Safety 7
4. Transport, packaging and storage 10
5. Commissioning, operation 11
6. Maintenance and cleaning 23
7. Dismounting, return and disposal 24
8. Specifications 25

4WIKA operating instructions model A2G-200
20210728.01 10/2021 EN/DE
EN
1. General information
The control panel with integrated room sensor described in the operating instructions
has been manufactured using state-of-the-art technology. All components are subject
to stringent quality and environmental criteria during production. Our management
systems are certified to ISO 9001 and ISO 14001.
These operating instructions contain important information on handling the
instrument. Working safely requires that all safety instructions and work instructions
are observed.
Observe the relevant local accident prevention regulations and general safety
regulations for the instrument's range of use.
The operating instructions are part of the product and must be kept in the immediate
vicinity of the instrument and readily accessible to skilled personnel at any time.
Pass the operating instructions on to the next operator or owner of the instrument.
Skilled personnel must have carefully read and understood the operating instructions
prior to beginning any work.
The general terms and conditions contained in the sales documentation shall apply.
Subject to technical modifications.
Further information:
- Internet address: www.wika.de / www.wika.com
- Relevant data sheet: SP 69.12
- Application consultant: Tel.: [phone]
Fax: [phone]
[e-mail]
1. General information

5WIKA operating instructions model A2G-200
20210728.01 10/2021 EN/DE
EN
2. Design and function
2.1 Overview
2. Design and function
Case
LC display
Hinged component
Mounting component
2.2 Description
The model A2G-200 control panel with integrated room sensor was developed
specifically for requirements in the ventilation and air-conditioning industry. Different
versions measure the key parameters of relative humidity, room air temperature and

The measuring results are transmitted with an analogue output signal (0 ... 10 V or
.





6WIKA operating instructions model A2G-200
20210728.01 10/2021 EN/DE
EN
2.3 Dimensions in mm
Cable connections
2. Design and function

7WIKA operating instructions model A2G-200
20210728.01 10/2021 EN/DE
EN
2.4 Scope of delivery
Control panel
Mounting screws
Available with:
- Touchscreen LC display
- Modbus®configuration
- Relay output
Cross-check scope of delivery with delivery note.
3. Safety
3.1 Explanation of symbols
WARNING!
... indicates a potentially dangerous situation that can result in serious
injury or death, if not avoided.
CAUTION!
... indicates a potentially dangerous situation that can result in light injuries
or damage to property or the environment, if not avoided.
DANGER!
... identifies hazards caused by electrical power. Should the safety
instructions not be observed, there is a risk of serious or fatal injury.
WARNING!
... indicates a potentially dangerous situation that can result in burns,
caused by hot surfaces or liquids, if not avoided.
Information
... points out useful tips, recommendations and information for efficient
and trouble-free operation.
2. Design and function / 3. Safety

8WIKA operating instructions model A2G-200
20210728.01 10/2021 EN/DE
EN
3.2 Intended use
This control panel is used for measuring the temperature, carbon dioxide (CO2
relative humidity of room air.
This instrument is not permitted to be used in hazardous areas!
The instrument has been designed and built solely for the intended use described here,
and may only be used accordingly.
The technical specifications contained in these operating instructions must be
observed. Improper handling or operation of the instrument outside of its technical
specifications requires the instrument to be taken out of service immediately and
inspected by an authorised WIKA service engineer.
The manufacturer shall not be liable for claims of any type based on operation contrary
to the intended use.
3.3 Improper use
WARNING!
Injuries through improper use
Improper use of the instrument can lead to hazardous situations and
injuries.
Refrain from unauthorised modifications to the instrument.
Do not use the instrument within hazardous areas.
Do not use the instrument with abrasive or viscous media.
Any use beyond or different to the intended use is considered as improper use.
Do not use this instrument in safety or emergency shutdown devices.
3.4 Responsibility of the operator
The instrument is used in the industrial sector. The operator is therefore responsible for
legal obligations regarding safety at work.
The safety instructions within these operating instructions, as well as the safety,
accident prevention and environmental protection regulations for the application area
must be maintained.
The operator is obliged to maintain the product label in a legible condition.
3. Safety

9WIKA operating instructions model A2G-200
20210728.01 10/2021 EN/DE
EN
To ensure safe working on the instrument, the operating company must ensure
that suitable first-aid equipment is available and aid is provided whenever required.
that the operating personnel are regularly instructed in all topics regarding work
safety, first aid and environmental protection and know the operating instructions and
in particular, the safety instructions contained therein.
that the instrument is suitable for the particular application in accordance with its
intended use.
that personal protective equipment is available.
3.5 Personnel qualification
WARNING!
Risk of injury should qualification be insufficient
Improper handling can result in considerable injury and damage to
property.
The activities described in these operating instructions may only be
carried out by skilled personnel who have the qualifications described
below.
Skilled electrical personnel
Skilled electrical personnel are understood to be personnel who, based on their
technical training, know-how and experience as well as their knowledge of country-
specific regulations, current standards and directives, are capable of carrying out work
on electrical systems and independently recognising and avoiding potential hazards.
The skilled electrical personnel have been specifically trained for the work environment
they are working in and know the relevant standards and regulations. The skilled
electrical personnel must comply with current legal accident prevention regulations.
Operating personnel
The personnel trained by the operator are understood to be personnel who, based
on their education, knowledge and experience, are capable of carrying out the work
described and independently recognising potential hazards.
Special operating conditions require further appropriate knowledge, e.g. of aggressive
media.
3. Safety

10 WIKA operating instructions model A2G-200
20210728.01 10/2021 EN/DE
EN
3. Safety / 4.Transport, packaging and storage
3.6 Labelling, safety marks
Product label (example)
Model Supply voltage
Measuring range Serial number
Output signal
Before mounting and commissioning the instrument, ensure you read the
operating instructions!
4. Transport, packaging and storage
4.1 Transport
Check the control panel for any damage that may have been caused by transport.
Obvious damage must be reported immediately.
CAUTION!
Damage through improper transport
With improper transport, a high level of damage to property can occur.
When unloading packed goods upon delivery as well as during
internal transport, proceed carefully and observe the symbols on the
packaging.
With internal transport, observe the instructions in chapter 4.2
“Packaging and storage”.
If the instrument is transported from a cold into a warm environment, the formation of
condensation may result in instrument malfunction. Before putting it back into operation,
wait for the instrument temperature and the room temperature to equalise.
4.2 Packaging and storage
Do not remove packaging until just before mounting.
Keep the packaging as it will provide optimum protection during transport (e.g. change

Permissible conditions at the place of storage:
Storage temperature: -20 ... +70 °C

Type: A2G-50
Range: -250 ... +250 Pa
Output: 0 ... 10 V / 4 ... 20 mA
Supply: DC 24 V / AC 24 V ±10 % < 1 W
Made in EU E-Nr. 66209848






11WIKA operating instructions model A2G-200
20210728.01 10/2021 EN/DE
EN
Avoid exposure to the following factors:
Direct sunlight or proximity to hot objects

Soot, vapour, humidity, dust and corrosive gases
Hazardous environments, flammable atmospheres
Store the control panel in its original packaging in a location that fulfils the conditions
listed above. If the original packaging is not available, pack and store the instrument as
described below:
1. Wrap the instrument in an antistatic plastic film.
2. Place the instrument, along with the shock-absorbent material, in the packaging.
3. 
a desiccant inside the packaging.
5. Commissioning, operation
WARNING!
Physical injuries and damage to property and the environment
caused by hazardous media
Upon contact with hazardous media (e.g. oxygen, acetylene, flammable


danger of physical injuries and damage to property and the environment.
Should a failure occur, aggressive media with extremely high temperature
and under high pressure or vacuum may be present at the instrument.
For these media, in addition to all standard regulations, the appropriate
existing codes or regulations must also be followed.
CAUTION!
Damage to the instrument

sensitive electronic components through electrostatic discharge.
The correct use of grounded working surfaces and personal armbands
is required.
DANGER!
Danger to life caused by electric current
Upon contact with live parts, there is a direct danger to life.
The instrument may only be installed and mounted by skilled
personnel.
Operation using a defective power supply unit (e.g. short-circuit from

voltages at the instrument!
4. Transport…/ 5. Commissioning, operation

12 WIKA operating instructions model A2G-200
20210728.01 10/2021 EN/DE
EN
5.1 Mechanical mounting
The mounting location must be chosen so that the control panel is at a distance of


to other instruments.The mounting location should have a representative temperature
for the room and have good ventilation.The control panel must be mounted on a flat
surface.
Avoid exposure to the following factors at the mounting location:
Direct sunlight

Radiant heat from instruments
Concealed pipes or chimneys
Exterior walls or unheated or uncooled areas
An incorrect mounting can lead to errors with the displayed temperature.
Instrument orientation
5. Commissioning, operation
Mounting
Mounting component
Cover locking screw
Mounting
screws

13WIKA operating instructions model A2G-200
20210728.01 10/2021 EN/DE
EN
5.2 Electrical mounting
For CE conformity of the control panel, a properly grounded shielding
cable from copper is required. Unused cables must be isolated or wired.
Each wiring can carry the full operating voltage or current, depending on
the installation. During electrical mounting, ensure careful handling of the
control panel to avoid electrostatic discharge to electronic components.
For the variant with relay, carry out the following before the electrical mounting:
Use a separate cable for the relay and the signal output.
Install the cover locking screw.
Cable routing
The control unit has three different openings for electrical mounting.The cables must be
laid through one of the three openings shown below and then wired.
Variant 1
Square opening at the
rear
Variant 2
Upper knockouts
Variant 3
Lower knockouts
Cable
5. Commissioning, operation

14 WIKA operating instructions model A2G-200
20210728.01 10/2021 EN/DE
EN
Connection diagram
When using long connection leads or connecting cables with a low cross-
section, measurement distortions may occur. In order to maintain the
measurement accuracy, in these circumstances, it is necessary
to use a separate GND conductor for the current of the voltage output.
Output DC 0/2 … 10 V / 4 … 20 mA
V V V
24 V
GND
CO2
r. h.
T
Analogue output: CO2, temperature (T) and relative humidity (r. h.)
Output DC 0/2 … 10 V / 4 … 20 mA
Output DC 0/2 … 10 V / 4 … 20 mA
V V V
24 V
GND
A
B
Analogue
Digital output: Modbus®
Output DC 0/2 … 10 V / 4 … 20 mA
Modbus®A
Modbus®B
Relay switching output (option)
V V V
NC
COM
NO
Output DC 0/2 … 10 V / 4 … 20 mA
V V V
24 V
GND
CO2
r. h.
T
Voltage output with GND conductor
Output DC 0/2 … 10 V
Output DC 0/2 … 10 V
Output DC 0/2 … 10 V
5. Commissioning, operation

15WIKA operating instructions model A2G-200
20210728.01 10/2021 EN/DE
EN
5.3 Configuration
The configuration of the control panel includes the setting of the output signals for
2
The selection of the output signal is made via the installation of jumpers. Each output
signal must be set separately for each measurand.
Configuration elements
Terminal strip

Pins for the LC display lock
Pins for the selection of the output signal

Pins for the terminal strip
Rear of hinged component
Mounting component



Installation of the jumpers
Jumper not
installed
Jumper
installed
Jumper
stored
Placing the jumper
5. Commissioning, operation



16 WIKA operating instructions model A2G-200
20210728.01 10/2021 EN/DE
EN
Setting of the DC 2 … 10 V output:
Install the jumper on the pins for the DC 0 … 10 V output for the corresponding
measurand.
Select the DC 2 … 10 V output via the operation of the LC display in the configuration

To prevent access to the configuration menu after the installation has been completed, a
jumper must also be installed on the pins for the LC display lock.
5.4 Operation
In order to access the SET UP menu, keep the screen pressed for three seconds.
If the jumper for the LC display lock has been installed, this must first be removed before
operation.
5.4.1 Navigation using the menu
Menu navigation
Return to the previous menu without making any changes.
Accept changes and return to the previous menu.
Swipe your finger vertically up or down to navigate between modes.
Swipe your finger horizontally to the left or right to navigate between parameters.
In the main menu, the display modes, the backlighting and also the outputs can be set.








5. Commissioning, operation
CO2
r. h.
T
DC 0 … 10 V 4 … 20 mA
Setting of the output signal
DC 0 … 10 V output 4 … 20 mA output Mixed outputs
CO2
r. h.
T
DC 0 … 10 V 4 … 20 mA
CO2
r. h.
T
DC 0 … 10 V 4 … 20 mA

17WIKA operating instructions model A2G-200
20210728.01 10/2021 EN/DE
EN
5.4.2 SET UP menu
Display mode
In order to set the display mode, press DISPLAY MODE
in the main menu.

Swipe vertically up or down in order to set the display
view.
Swipe horizontally left or right in order to change the
measurand displayed.
Press


in order to confirm the selected display mode.

Display view
Individual value display
Simultaneous display of two
different values
Display of all values
simultaneously
Trend diagram
Smileys
Auto-change mode
By selecting the auto-change mode, the display view changes at a selected change
interval.
Select  or exclude the desired
display views in the sequential display.
To activate the auto-change mode, change the change interval ± one step.
Increase or decrease the change interval in one-second steps by pressing

4 s
CYCLE DISP LAY
MODE ( ) EVERY
.
Press


in order to confirm the selected display views for the auto-change mode.

specified interval.
555
CO2ppm 60.1
% rH 24.5
°C
1200
CO2
ppm
h
400
–24 0
555 ppm 100
% rH
h
60.1 %
400
–24 0
50
°C
h
24.5 °C
0
–24 0
60.1
% rH 24.5 °C
555 CO2ppm
24.5
°C 555 CO2 ppm
60.1 % rH
60.1
% rH 555 CO2 ppm
24.5 °C
555
CO2ppm 
60.1 % rH
555 CO2ppm
555 CO2ppm
24.5 °C
24.5 °C
60.1 % rH
555
CO2ppm 60.1
% rH 24.5
°C
1200
CO2
ppm
h
400
–24 0
555 ppm 100
% rH
h
60.1 %
400
–24 0
50
°C
h
24.5 °C
0
–24 0
60.1
% rH 24.5 °C
555 CO2ppm
24.5
°C 555 CO2 ppm
60.1 % rH
60.1
% rH 555 CO2 ppm
24.5 °C
555
CO2ppm 
60.1 % rH
555 CO2ppm
555 CO2ppm
24.5 °C
24.5 °C
60.1 % rH
555
CO2ppm 60.1
% rH 24.5
°C
1200
CO2
ppm
h
400
–24 0
555 ppm 100
% rH
h
60.1 %
400
–24 0
50
°C
h
24.5 °C
0
–24 0
60.1
% rH 24.5 °C
555 CO2ppm
24.5
°C 555 CO2 ppm
60.1 % rH
60.1
% rH 555 CO2 ppm
24.5 °C
555
CO2ppm 
60.1 % rH
555 CO2ppm
555 CO2ppm
24.5 °C
24.5 °C
60.1 % rH
555
CO2ppm 60.1
% rH 24.5
°C
1200
CO2
ppm
h
400
–24 0
555 ppm 100
% rH
h
60.1 %
400
–24 0
50
°C
h
24.5 °C
0
–24 0
60.1
% rH 24.5 °C
555 CO2ppm
24.5
°C 555 CO2 ppm
60.1 % rH
60.1
% rH 555 CO2 ppm
24.5 °C
555
CO2ppm 
60.1 % rH
555 CO2ppm
555 CO2ppm
24.5 °C
24.5 °C
60.1 % rH
555
CO2ppm 60.1
% rH 24.5
°C
1200
CO2
ppm
h
400
–24 0
555 ppm 100
% rH
h
60.1 %
400
–24 0
50
°C
h
24.5 °C
0
–24 0
60.1
% rH 24.5 °C
555 CO2ppm
24.5
°C 555 CO2 ppm
60.1 % rH
60.1
% rH 555 CO2 ppm
24.5 °C
555
CO2ppm 
60.1 % rH
555 CO2ppm
555 CO2ppm
24.5 °C
24.5 °C
60.1 % rH

4 s
CYCLE DISP LA Y
MODE ( ) EVER Y
5. Commissioning, operation
DISPLAY MODE
SET UP
BACKLIGHT
OUTPUTS




P-BANDS
OUTPUTS
OUTPUT MODES
RELAY


MODBUS
ADDRESS
BAUD RATE
PARITY BIT


RELAY
PARAMETER
SW. POINTS
TREND

18 WIKA operating instructions model A2G-200
20210728.01 10/2021 EN/DE
EN
Backlighting
Press BACKLIGHT in the main menu in order to set the backlighting.

Swipe horizontally left or right in order to change the intensity of the backlighting.
Press


in order to confirm the selected intensity.

5.4.3 Outputs
In the SET UP menu, press OUTPUTS in order to set
the outputs.
OUTPUTS menu, with the options P-BANDS,
OUTPUT MODES and RELAY
displayed.
P-BANDS
Press P-BANDS in order to adjust the corresponding output ranges.
P-BANDS menu with the selectable parameters of CO2,humidity and
temperature will be displayed.
Press on the desired parameter in order to set the output range.

Press the screen or wait for a few seconds in order to close the INFO view.
Band Limits menu will be displayed.
Press HIGH LIMIT in order to define the upper limit value of the output.
Press LOW LIMIT in order to define the lower limit value of the output.
Decrease or increase the limit value by pressing

4 s
CYCLE DISP LAY
MODE ( ) EVERY
.
Press


in order to confirm the selected values.

OUTPUT MODES
Press MAX VALUE OUT in order to activate a comparison between the CO2 and the
temperature values.


Press 0/2-10 V in order to select DC 0 … 10 V or DC 2 … 10 V as the output signal.

5.4.4 RELAY (option)
This menu is only available with a version with relay.
In the OUTPUTS menu, press RELAY in order to
configure the relay.
RELAY menu, with the options of PARAMETER,
SW. POINTS and TREND, will be displayed.
DISPLAY MODE
SET UP
BACKLIGHT
OUTPUTS




P-BANDS
OUTPUTS
OUTPUT MODES
RELAY


MODBUS
ADDRESS
BAUD RATE
PARITY BIT


RELAY
PARAMETER
SW. POINTS
TREND
DISPLAY MODE
SET UP
BACKLIGHT
OUTPUTS




P-BANDS
OUTPUTS
OUTPUT MODES
RELAY


MODBUS
ADDRESS
BAUD RATE
PARITY BIT


RELAY
PARAMETER
SW. POINTS
TREND
5. Commissioning, operation

19WIKA operating instructions model A2G-200
20210728.01 10/2021 EN/DE
EN
PARAMETER
Press PARAMETER in the RELAY menu in order to select the desired parameter.

Select the desired parameter.
Press


in order to confirm the selected parameter.

SW. POINTS
Press SW. POINTS in the RELAY menu in order to set the relay switch points.

Press


in order to confirm the switch points.

TREND
Press TREND in the RELAY menu in order to set the switch trend of the relay.
Select INCREASING in order to set the switch trend to rising.
Select DECREASING in order to set the switch trend to falling.
Press


in order to confirm the switch trend.

5.4.5 MODBUS (option)
This menu is only available with a version with Modbus®
output.
Press OUTPUTS in the main menu.
Press MODBUS
MODBUS menu, with the options of ADDRESS,
BAUD RATE and PARITY BIT, will be displayed.
ADDRESS
Press ADDRESS in the MODBUS menu in order to set the Modbus®address
1 … 247.
Decrease or increase the value of the address by pressing

4 s
CYCLE DISP LAY
MODE ( ) EVERY
.
Press


in order to confirm the address.

BAUD RATE
Press BAUD RATE in the MODBUS menu in order to set the number of transmitted
characters per time period.
Select the desired baud rate by pressing the options presented.
Press


in order to confirm the baud rate.

DISPLAY MODE
SET UP
BACKLIGHT
OUTPUTS




P-BANDS
OUTPUTS
OUTPUT MODES
RELAY


MODBUS
ADDRESS
BAUD RATE
PARITY BIT


RELAY
PARAMETER
SW. POINTS
TREND
5. Commissioning, operation

20 WIKA operating instructions model A2G-200
20210728.01 10/2021 EN/DE
EN
PARITY BIT
Press PARITY BIT in the MODBUS menu in order to set to odd or even or to switch
off a discrete character check bit for error detection in the parity check.
Press the desired setting for the parity bit.
Press


in order to confirm the setting.

5.5 Modbus®protocol
Functions for the Modbus®communication
Function code Description
01 Read coil status
02 Read input status
03 Read holding registers
04 Read input registers
05 Force single coil
06 Preset single register
07 Read exception status
15 Force multiple coils
16 Preset multiple registers
17 Report slave ID
Function code 02 - Read input status
Register Parameter description Data type Value Range
1x0001 Relay status Bit 0 0…1 On/Off
1x0002 Relay trend 0…1 0 = increasing
1 = decreasing
Function code 03 - Read holding registers
Register Parameter description Data type Value Range
4x0001 Parameter for analogue
output
16 bit 0…3 0 = CO2, 1 = r.F.,
2 = T, 3 = MAX
4x0002  500…2000 500 … 2,000 ppm
4x0003  0…1900 0 … 1,900 ppm
4x0004 R. h. high limit 100…1000 10.0 … 100.0 %
4x0005 R. h. low limit 0…900 0.0 … 90.0 %
4x0006 T high limit 50…500 5.0 … 50.0 °C
5. Commissioning, operation